Radiation amount during HRCT is so much less that hardly cause breast cancer. In my entire medical life I didn’t any case.

All persons including females can undergo and should undergo HRCT when it is medically indicated . The radiation that you get from an HRCT, is so small less than 1mSv, which is way below any sort of danger levels. Also the effect, of radiation on body is so minimal from an HRCT, than the benefit that you get by doing a test like that. So absolutely nothing to worry about, also this is a one off procedure, and you won't be doing it frequently. Only thing is repeat the test only when indicated and suggested my a qualified medical practitioner.